Lochinvar EnergyRite ER302 - Manual (Page 26)

26
Installation & Operation Manual
5
Sidewall venting
The Power DirectAire Horizontal combustion air supply system
has specific material and installation requirements. The air inlet
pipe uses an adapter to supply combustion air and for
connection directly to the pool heater. The combustion air inlet
pipe will be a dedicated system with one air inlet pipe per pool
heater. The air inlet pipe must be connected to a combustion air
inlet cap as specified in this section. Combustion air supply
pipes for multiple pool heater installations can NOT be
combined into a single pipe and inlet termination point.
Combustion air supplied from outdoors must be free of
contaminants (see Combustion and Ventilation Air Requirements
in the Determine Pool Heater Location section).
Figure 5-4_Air Inlet Cap for Sidewall Termination
Sidewall air inlet
The sidewall air inlet cap is supplied in the Power DirectAire
Horizontal Vent kit which must be ordered from the
manufacturer. This sidewall cap will supply combustion air for
a single unit only.
Locate units as close as possible to a sidewall where the
combustion air supply system will be installed.
To prevent recirculation of flue products from an adjacent vent
cap into the combustion air inlet, follow all applicable clearance
requirements in the latest edition of the National Fuel Gas Code
and instructions in this manual.
The combustion air inlet cap must be installed at least one foot
above ground level and above normal snow levels.
The point of termination for the combustion air inlet cap MUST
be at least 3 feet below the point of flue gas termination (power
vent cap) if it is located within 10 feet of the flue outlet from the
power vent cap.
Use care to ensure that the air inlet cap assembly is properly
installed on the air inlet pipe. The combustion air inlet cap and
the power vent cap MUST be installed on the same wall and the
same pressure zone.
The combustion air inlet cap must not be installed closer than
10 feet from an inside corner of an L-shaped structure.
Incorrect installation and/or location of the air inlet cap can
allow the discharge of flue products to be drawn into the
combustion process on the pool heater. This can result in
incomplete combustion and potentially hazardous levels of
carbon monoxide in the flue products. This will cause
operational problems with the pool heater and possible spillage
of flue products which can cause personal injury, death, or
property damage.
Length of air inlet pipe
The total equivalent length of the Power DirectAire Horizontal
combustion air inlet pipe must not exceed a maximum of 75
equivalent feet in length. Subtract 5 feet for each elbow in the air
intake system. Do not exceed limits for the combustion air inlet
piping lengths.
Air inlet pipe materials
The Power DirectAire Horizontal system requires installation of
a separate pipe to supply combustion air from outdoors directly
to the pool heater. See the air inlet pipe materials specified in the
DirectAire Venting section for material requirements and sealing
recommendations for the air inlet pipe in a DirectAire
Horizontal system.
ƽ CAUTION Using other vent or air intake materials,
failure to properly seal all seams and joints or
failure to follow vent pipe manufacturer’s
instructions can result in personal injury,
death, or property damage. Mixing of
venting materials will void the warranty and
certification of the pool heater.
The use of double-wall vent material for the
combustion air inlet pipe is recommended
when the pool heater is operated in cold
climates to prevent the condensation of
airborne moisture in the incoming
combustion air.
NOTICE
Vent kits
The Power DirectAire Horizontal Vent kit for sidewall
installation MUST be ordered from the pool heater
manufacturer. The part number for each kit is listed by unit size.
Each kit has a flue adapter, inlet air collar, sidewall power vent
cap, barometric damper, proving switch, controls, and
combustion air inlet cap to supply air to a single pool heater and
instructions for proper installation. The flue pipe and air inlet
pipes are purchased locally.